Lightning-arrester.



No. 744,106. PATENTED NOV. 17, 1903 H. E. RAYMOND.

LIGHTNING ARRESTER.

APPLICATION FILED JULY 22, 1899.

UNITED STATES Patented November 1'7, 1903.;

PATENT OFFICE.

HENRY E. RAYMOND, OF SOHENECTADY, NEW YORK, ASSIGNOR TO THE GENERALELECTRIC COMPANY, A CORPORATION OF NEW YORK.

LIGHTNING-ARRESTER.

SPECIFICATION forming part of Letters Patent No. 744,106, dated November17, 1903.

Application filed July 22, 1899. Serial No. 724,771. (No model.)

To all whom it may concern:

Be it known that I, HENRY E. RAYMOND, a citizen of the United States,residing at Schenectady, county of Schenectady, State of New York, haveinvented certain new and useful Improvements in Lightning-Arresters, ofwhich the following is a specification.

This invention relates to lightning-arresters and is an application ofmy discovery that the tendency of a lightning charge to jump an air-gapis increased by an increase in the extent of the surfaces of theelectrode-dischargers which are exposed to each other. The increasedsurfaces of such dischargers also serve to quickly convey the heatgenerated by a lightning charge away from the dischargers and theincluded air-gaps.

Figures 1 and 2 of the drawings are a plan and elevation, respectively,of one form of arrester embodying my invention, which invention may beembodied in various structures without varying the essential features ofthe same. I prefer, however, to embody the invention in the standardform of arrester with a non-inductive resistance in series with theair-gap to prevent the line-current from continuing the are formed bythe lightningdischarge.

The binding-posts to which connections are made from the line arerepresented by L and L. Metallic dischargers A of cylindrical or othersuitable form are mounted upon and in electrical connection with aconductingstrip 0, and non-inductive resistances R are placed in serieswith the line and dischargers and are supported in suitable clipsorbrackets F.

A second set of dischargers B, located in proximity to the dischargersA, is mounted upon and electrically connected with a secondconducting-strip D, from which connection is made with the ground at G.

It is clear that but one side of the line might be connected to thefirst set of dischargers at either of the dischargers A. It is alsoobvious that the connections of the line to A A and of B B to groundneed not be limited to the series arrangement shown, but may be extendedto any other desired.

The operation of the device is very simple. If a charge strikes throughL, it will flow along the strip O and will then have fourcontemporaneous paths between the dischargers A A and B B. All thedischargers may be made rotatable about their axes if it is desired, andthe number of dischargers is not limited to four, as similararrangements embodying the essential features of my invention may bemade with an increased number of dischargers. The peculiararrangement ofthe dischargers provides a very large effective area of spark-gap, and Ibelieve that a capacity or resonant effect is thereby created whichserves to assist the discharge.

What I claim as new, and desire to secure by Letters Patent of theUnited States, is

l. The combination in a lightning-arrester, of a plurality ofindependent dischargers connected to line, each arranged to formair-gaps in multiple between itself and a plurality of independentdischargers connected to ground.

2. The combination in a lightning-arrester, of independent dischargerselectrically connected in series to line, each discharger being arrangedto form air-gaps in multiple between itself and two common dischargersconnected to ground.

3. The combination in a lightning-arrester, with twoelectrically-connected cylindrical dischargers, of a third dischargerarranged in such relation to said dischargers that a large area ofdischarge-surface will be estab lished between each of the connecteddischargers and the third discharger.

4. The combination in a lightning-arrester, with two independentelectrically-connected dischargers having discharge and radiatingsurfaces of large extent, of a third discharger also having dischargeand radiating surface of large extent arranged to establish sparkingdistances of large area between each of said dischargers and itself, anda non-inductive resistance in series between the line and thedischarge-surfaces connected therewith.

5. A lightning-arrester, which comprises a set of dischargerselectrically connected to each other and to line, and a second set ofdischargers electrically connected to each other and to ground, eachdischarger connected to line being arranged in proximity to everydischarger connected to ground.

6. A lightning-arrester, which comprises a set of dischargers connectedto line, and a second set of dischargers connected to ground, eachdischarger connected to line being arranged in proximity toeverydischarger connected to ground.

7. A lightning-arrester Which comprises a set of disehargers connectedto line, and a second set of dischargers connected to ground, eachdischarger connected to ground being arranged in proximity to everydischarger connected to line.

8. A lightningarrester, comprising a set of dischargers connected toline, and a second set of disehargers connected to ground, eachdischarger connected to line being arranged in proximity to everydischarger connected to ground, and each discharger connected to groundbeing arranged in proximity to every discharger connected to line.

9. A lightnin g-arrester which comprises dischargers connected in seriesto line, and dischargers connecting in series to ground, saiddischargers being so arranged that each discharger connected to linetogether with each discharger connected to ground include an air-gap,all the air-gaps thus formed being in multiple between the line andground.

10. A lightning-arrester which comprises a plurality of dischargers,each connected to line through a non-inductive resistance, a conductorconnecting said dischargers together, and a plurality of dischargersconnected to ground, each of which latter dischargers is separated by ashort air-gap from each of the dischargers connected to line.

In Witness whereof I have hereunto set my hand this 20th day of July,1899.

HENRY E. RAYMOND.

Witnesses:

BENJAMIN B. HULL, CAROLYN L. HAYNES.

